'use strict';

const fs = require('fs');
const path = require('path');
const webpack = require('webpack');
const resolve = require('resolve');
const PnpWebpackPlugin = require('pnp-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
const InlineChunkHtmlPlugin = require('react-dev-utils/InlineChunkHtmlPlugin');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const safePostCssParser = require('postcss-safe-parser');
const ManifestPlugin = require('webpack-manifest-plugin');
const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
const WorkboxWebpackPlugin = require('workbox-webpack-plugin');
const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
// const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
const ESLintPlugin = require('eslint-webpack-plugin');
const paths = require('./paths');
const modules = require('./modules');
const getClientEnvironment = require('./env');
const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
const ForkTsCheckerWebpackPlugin = require('react-dev-utils/ForkTsCheckerWebpackPlugin');
const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
const ReactRefreshWebpackPlugin = require('@pmmmwh/react-refresh-webpack-plugin');

const postcssNormalize = require('postcss-normalize');

const appPackageJson = require(paths.appPackageJson);

// Source maps are resource heavy and can cause out of memory issue for large source files.
const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';

const webpackDevClientEntry = require.resolve(
	'react-dev-utils/webpackHotDevClient'
);
const reactRefreshOverlayEntry = require.resolve(
	'react-dev-utils/refreshOverlayInterop'
);

// Some apps do not need the benefits of saving a web request, so not inlining the chunk
// makes for a smoother build process.
const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';

const imageInlineSizeLimit = parseInt(
	process.env.IMAGE_INLINE_SIZE_LIMIT || '10000'
);

// Check if TypeScript is setup
const useTypeScript = fs.existsSync(paths.appTsConfig);

// Get the path to the uncompiled service worker (if it exists).
const swSrc = paths.swSrc;

// style files regexes
const cssRegex = /\.css$/;
const cssModuleRegex = /\.module\.css$/;
const sassRegex = /\.(scss|sass)$/;
const sassModuleRegex = /\.module\.(scss|sass)$/;
const lessRegex = /\.less$/;
const lessModuleRegex = /\.module\.less$/;

const hasJsxRuntime = (() => {
	if (process.env.DISABLE_NEW_JSX_TRANSFORM === 'true') {
		return false;
	}

	try {
		require.resolve('react/jsx-runtime');
		return true;
	} catch (e) {
		return false;
	}
})();

// This is the production and development configuration.
// It is focused on developer experience, fast rebuilds, and a minimal bundle.
module.exports = function(webpackEnv) {
	const isEnvDevelopment = webpackEnv === 'development';
	const isEnvProduction = webpackEnv === 'production';

	// Variable used for enabling profiling in Production
	// passed into alias object. Uses a flag if passed into the build command
	const isEnvProductionProfile =
		isEnvProduction && process.argv.includes('--profile');

	// We will provide `paths.publicUrlOrPath` to our app
	// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
	// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
	// Get environment variables to inject into our app.
	const env = getClientEnvironment(paths.publicUrlOrPath.slice(0, -1));

	const shouldUseReactRefresh = env.raw.FAST_REFRESH;

	// common function to get style loaders
	const getStyleLoaders = (cssOptions, preProcessor) => {
		const loaders = [
			isEnvDevelopment && require.resolve('style-loader'),
			isEnvProduction && {
				loader: MiniCssExtractPlugin.loader,
				// css is located in `static/css`, use '../../' to locate index.html folder
				// in production `paths.publicUrlOrPath` can be a relative path
				options: paths.publicUrlOrPath.startsWith('.') ?
					{
						publicPath: '../../'
					} :
					{},
			},
			{
				loader: require.resolve('css-loader'),
				options: cssOptions,
			},
			{
				// Options for PostCSS as we reference these options twice
				// Adds vendor prefixing based on your specified browser support in
				// package.json
				loader: require.resolve('postcss-loader'),
				options: {
					// Necessary for external CSS imports to work
					// https://github.com/facebook/create-react-app/issues/2677
					ident: 'postcss',
					plugins: () => [
						require('postcss-flexbugs-fixes'),
						require('postcss-preset-env')({
							autoprefixer: {
								flexbox: 'no-2009',
							},
							stage: 3,
						}),
						// Adds PostCSS Normalize as the reset css with default options,
						// so that it honors browserslist config in package.json
						// which in turn let's users customize the target behavior as per their needs.
						postcssNormalize(),
					],
					sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
				},
			},
		].filter(Boolean);
		if (preProcessor) {
			loaders.push({
				loader: require.resolve('resolve-url-loader'),
				options: {
					sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
					root: paths.appSrc,
				},
			}, {
				loader: require.resolve(preProcessor),
				options: {
					sourceMap: true,
				},
			});
		}
		return loaders;
	};

	return {
		mode: isEnvProduction ? 'production' : isEnvDevelopment && 'development',
		// Stop compilation early in production
		bail: isEnvProduction,
		devtool: isEnvProduction ?
			shouldUseSourceMap ?
			'source-map' :
			false :
			isEnvDevelopment && 'cheap-module-source-map',
		// These are the "entry points" to our application.
		// This means they will be the "root" imports that are included in JS bundle.
		entry: isEnvDevelopment && !shouldUseReactRefresh ?
			[
				// Include an alternative client for WebpackDevServer. A client's job is to
				// connect to WebpackDevServer by a socket and get notified about changes.
				// When you save a file, the client will either apply hot updates (in case
				// of CSS changes), or refresh the page (in case of JS changes). When you
				// make a syntax error, this client will display a syntax error overlay.
				// Note: instead of the default WebpackDevServer client, we use a custom one
				// to bring better experience for Create React App users. You can replace
				// the line below with these two lines if you prefer the stock client:
				//
				// require.resolve('webpack-dev-server/client') + '?/',
				// require.resolve('webpack/hot/dev-server'),
				//
				// When using the experimental react-refresh integration,
				// the webpack plugin takes care of injecting the dev client for us.
				webpackDevClientEntry,
				// Finally, this is your app's code:
				paths.appIndexJs,
				// We include the app code last so that if there is a runtime error during
				// initialization, it doesn't blow up the WebpackDevServer client, and
				// changing JS code would still trigger a refresh.
			] :
			paths.appIndexJs,
		output: {
			// The build folder.
			path: isEnvProduction ? paths.appBuild : undefined,
			// Add /* filename */ comments to generated require()s in the output.
			pathinfo: isEnvDevelopment,
			// There will be one main bundle, and one file per asynchronous chunk.
			// In development, it does not produce real files.
			filename: isEnvProduction ?
				'static/js/[name].[contenthash:8].js' :
				isEnvDevelopment && 'static/js/bundle.js',
			// TODO: remove this when upgrading to webpack 5
			futureEmitAssets: true,
			// There are also additional JS chunk files if you use code splitting.
			chunkFilename: isEnvProduction ?
				'static/js/[name].[contenthash:8].chunk.js' :
				isEnvDevelopment && 'static/js/[name].chunk.js',
			// webpack uses `publicPath` to determine where the app is being served from.
			// It requires a trailing slash, or the file assets will get an incorrect path.
			// We inferred the "public path" (such as / or /my-project) from homepage.
			publicPath: paths.publicUrlOrPath,
			// Point sourcemap entries to original disk location (format as URL on Windows)
			devtoolModuleFilenameTemplate: isEnvProduction ?
				info =>
				path
				.relative(paths.appSrc, info.absoluteResourcePath)
				.replace(/\\/g, '/') :
				isEnvDevelopment &&
				(info => path.resolve(info.absoluteResourcePath).replace(/\\/g, '/')),
			// Prevents conflicts when multiple webpack runtimes (from different apps)
			// are used on the same page.
			jsonpFunction: `webpackJsonp${appPackageJson.name}`,
			// this defaults to 'window', but by setting it to 'this' then
			// module chunks which are built will work in web workers as well.
			globalObject: 'this',
		},
		optimization: {
			minimize: isEnvProduction,
			minimizer: [
				// This is only used in production mode
				new TerserPlugin({
					terserOptions: {
						parse: {
							// We want terser to parse ecma 8 code. However, we don't want it
							// to apply any minification steps that turns valid ecma 5 code
							// into invalid ecma 5 code. This is why the 'compress' and 'output'
							// sections only apply transformations that are ecma 5 safe
							// https://github.com/facebook/create-react-app/pull/4234
							ecma: 8,
						},
						compress: {
							ecma: 5,
							warnings: false,
							// Disabled because of an issue with Uglify breaking seemingly valid code:
							// https://github.com/facebook/create-react-app/issues/2376
							// Pending further investigation:
							// https://github.com/mishoo/UglifyJS2/issues/2011
							comparisons: false,
							// Disabled because of an issue with Terser breaking valid code:
							// https://github.com/facebook/create-react-app/issues/5250
							// Pending further investigation:
							// https://github.com/terser-js/terser/issues/120
							inline: 2,
						},
						mangle: {
							safari10: true,
						},
						// Added for profiling in devtools
						keep_classnames: isEnvProductionProfile,
						keep_fnames: isEnvProductionProfile,
						output: {
							ecma: 5,
							comments: false,
							// Turned on because emoji and regex is not minified properly using default
							// https://github.com/facebook/create-react-app/issues/2488
							ascii_only: true,
						},
					},
					sourceMap: shouldUseSourceMap,
				}),
				// This is only used in production mode
				new OptimizeCSSAssetsPlugin({
					cssProcessorOptions: {
						parser: safePostCssParser,
						map: shouldUseSourceMap ?
							{
								// `inline: false` forces the sourcemap to be output into a
								// separate file
								inline: false,
								// `annotation: true` appends the sourceMappingURL to the end of
								// the css file, helping the browser find the sourcemap
								annotation: true,
							} :
							false,
					},
					cssProcessorPluginOptions: {
						preset: ['default', {
							minifyFontValues: {
								removeQuotes: false
							}
						}],
					},
				}),
			],
			// Automatically split vendor and commons
			// https://twitter.com/wSokra/status/969633336732905474
			// https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
			splitChunks: {
				chunks: 'all',
				name: false,
			},
			// Keep the runtime chunk separated to enable long term caching
			// https://twitter.com/wSokra/status/969679223278505985
			// https://github.com/facebook/create-react-app/issues/5358
			runtimeChunk: {
				name: entrypoint => `runtime-${entrypoint.name}`,
			},
		},
		resolve: {
			// This allows you to set a fallback for where webpack should look for modules.
			// We placed these paths second because we want `node_modules` to "win"
			// if there are any conflicts. This matches Node resolution mechanism.
			// https://github.com/facebook/create-react-app/issues/253
			modules: ['node_modules', paths.appNodeModules].concat(
				modules.additionalModulePaths || []
			),
			// These are the reasonable defaults supported by the Node ecosystem.
			// We also include JSX as a common component filename extension to support
			// some tools, although we do not recommend using it, see:
			// https://github.com/facebook/create-react-app/issues/290
			// `web` extension prefixes have been added for better support
			// for React Native Web.
			extensions: paths.moduleFileExtensions
				.map(ext => `.${ext}`)
				.filter(ext => useTypeScript || !ext.includes('ts')),
			alias: {
				// Support React Native Web
				// https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
				'react-native': 'react-native-web',
				// Allows for better profiling with ReactDevTools
				...(isEnvProductionProfile && {
					'react-dom$': 'react-dom/profiling',
					'scheduler/tracing': 'scheduler/tracing-profiling',
				}),
				...(modules.webpackAliases || {}),
			},
			plugins: [
				// Adds support for installing with Plug'n'Play, leading to faster installs and adding
				// guards against forgotten dependencies and such.
				PnpWebpackPlugin,
				// Prevents users from importing files from outside of src/ (or node_modules/).
				// This often causes confusion because we only process files within src/ with babel.
				// To fix this, we prevent you from importing files out of src/ -- if you'd like to,
				// please link the files into your node_modules/ and let module-resolution kick in.
				// Make sure your source files are compiled, as they will not be processed in any way.
				// new ModuleScopePlugin(paths.appSrc, [
				// 	paths.appPackageJson,
				// 	reactRefreshOverlayEntry,
				// ]),
			],
		},
		resolveLoader: {
			plugins: [
				// Also related to Plug'n'Play, but this time it tells webpack to load its loaders
				// from the current package.
				PnpWebpackPlugin.moduleLoader(module),
			],
		},
		module: {
			strictExportPresence: true,
			rules: [
				// Disable require.ensure as it's not a standard language feature.
				{
					parser: {
						requireEnsure: false
					}
				},
				{
					// "oneOf" will traverse all following loaders until one will
					// match the requirements. When no loader matches it will fall
					// back to the "file" loader at the end of the loader list.
					oneOf: [
						// TODO: Merge this config once `image/avif` is in the mime-db
						// https://github.com/jshttp/mime-db
						{
							test: [/\.avif$/],
							loader: require.resolve('url-loader'),
							options: {
								limit: imageInlineSizeLimit,
								mimetype: 'image/avif',
								name: 'static/media/[name].[hash:8].[ext]',
							},
						},
						// "url" loader works like "file" loader except that it embeds assets
						// smaller than specified limit in bytes as data URLs to avoid requests.
						// A missing `test` is equivalent to a match.
						{
							test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
							loader: require.resolve('url-loader'),
							options: {
								limit: imageInlineSizeLimit,
								name: 'static/media/[name].[hash:8].[ext]',
							},
						},
						// Process application JS with Babel.
						// The preset includes JSX, Flow, TypeScript, and some ESnext features.
						{
							test: /\.(js|mjs|jsx|ts|tsx)$/,
							include: paths.appSrc,
							loader: require.resolve('babel-loader'),
							options: {
								customize: require.resolve(
									'babel-preset-react-app/webpack-overrides'
								),

								plugins: [
									[
										require.resolve('babel-plugin-named-asset-import'),
										{
											loaderMap: {
												svg: {
													ReactComponent: '@svgr/webpack?-svgo,+titleProp,+ref![path]',
												},
											},
										},
									],
									isEnvDevelopment &&
									shouldUseReactRefresh &&
									require.resolve('react-refresh/babel'),
								].filter(Boolean),
								// This is a feature of `babel-loader` for webpack (not Babel itself).
								// It enables caching results in ./node_modules/.cache/babel-loader/
								// directory for faster rebuilds.
								cacheDirectory: true,
								// See #6846 for context on why cacheCompression is disabled
								cacheCompression: false,
								compact: isEnvProduction,
							},
						},
						// Process any JS outside of the app with Babel.
						// Unlike the application JS, we only compile the standard ES features.
						{
							test: /\.(js|mjs)$/,
							exclude: /@babel(?:\/|\\{1,2})runtime/,
							loader: require.resolve('babel-loader'),
							options: {
								babelrc: false,
								configFile: false,
								compact: false,
								presets: [
									[
										require.resolve('babel-preset-react-app/dependencies'),
										{
											helpers: true
										},
									],
								],
								cacheDirectory: true,
								// See #6846 for context on why cacheCompression is disabled
								cacheCompression: false,

								// Babel sourcemaps are needed for debugging into node_modules
								// code.  Without the options below, debuggers like VSCode
								// show incorrect code and set breakpoints on the wrong lines.
								sourceMaps: shouldUseSourceMap,
								inputSourceMap: shouldUseSourceMap,
							},
						},
						// "postcss" loader applies autoprefixer to our CSS.
						// "css" loader resolves paths in CSS and adds assets as dependencies.
						// "style" loader turns CSS into JS modules that inject <style> tags.
						// In production, we use MiniCSSExtractPlugin to extract that CSS
						// to a file, but in development "style" loader enables hot editing
						// of CSS.
						// By default we support CSS Modules with the extension .module.css
						{
							test: cssRegex,
							exclude: cssModuleRegex,
							use: getStyleLoaders({
								importLoaders: 1,
								sourceMap: isEnvProduction ?
									shouldUseSourceMap :
									isEnvDevelopment,
							}),
							// Don't consider CSS imports dead code even if the
							// containing package claims to have no side effects.
							// Remove this when webpack adds a warning or an error for this.
							// See https://github.com/webpack/webpack/issues/6571
							sideEffects: true,
						},
						// Adds support for CSS Modules (https://github.com/css-modules/css-modules)
						// using the extension .module.css
						{
							test: cssModuleRegex,
							use: getStyleLoaders({
								importLoaders: 1,
								sourceMap: isEnvProduction ?
									shouldUseSourceMap :
									isEnvDevelopment,
								modules: {
									getLocalIdent: getCSSModuleLocalIdent,
								},
							}),
						},
						// Opt-in support for SASS (using .scss or .sass extensions).
						// By default we support SASS Modules with the
						// extensions .module.scss or .module.sass
						{
							test: sassRegex,
							exclude: sassModuleRegex,
							use: getStyleLoaders({
									importLoaders: 3,
									sourceMap: isEnvProduction ?
										shouldUseSourceMap :
										isEnvDevelopment,
								},
								'sass-loader'
							),
							// Don't consider CSS imports dead code even if the
							// containing package claims to have no side effects.
							// Remove this when webpack adds a warning or an error for this.
							// See https://github.com/webpack/webpack/issues/6571
							sideEffects: true,
						},
						// Adds support for CSS Modules, but using SASS
						// using the extension .module.scss or .module.sass
						{
							test: sassModuleRegex,
							use: getStyleLoaders({
									importLoaders: 3,
									sourceMap: isEnvProduction ?
										shouldUseSourceMap :
										isEnvDevelopment,
									modules: {
										getLocalIdent: getCSSModuleLocalIdent,
									},
								},
								'sass-loader'
							),
						},
						{
							test: lessRegex,
							exclude: lessModuleRegex,
							use: getStyleLoaders({
									importLoaders: 3,
									sourceMap: isEnvProduction && shouldUseSourceMap,
								},
								'less-loader'
							),
							sideEffects: true,
						}, {
							test: lessModuleRegex,
							use: getStyleLoaders({
									importLoaders: 3,
									sourceMap: isEnvProduction && shouldUseSourceMap,
									modules: {
										getLocalIdent: getCSSModuleLocalIdent,
									},
								},
								'less-loader'
							),
						},
						// "file" loader makes sure those assets get served by WebpackDevServer.
						// When you `import` an asset, you get its (virtual) filename.
						// In production, they would get copied to the `build` folder.
						// This loader doesn't use a "test" so it will catch all modules
						// that fall through the other loaders.
						{
							loader: require.resolve('file-loader'),
							// Exclude `js` files to keep "css" loader working as it injects
							// its runtime that would otherwise be processed through "file" loader.
							// Also exclude `html` and `json` extensions so they get processed
							// by webpacks internal loaders.
							exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
							options: {
								name: 'static/media/[name].[hash:8].[ext]',
							},
						},
						// ** STOP ** Are you adding a new loader?
						// Make sure to add the new loader(s) before the "file" loader.
					],
				},
			],
		},
		plugins: [
			// Generates an `index.html` file with the <script> injected.
			new HtmlWebpackPlugin(
				Object.assign({}, {
						inject: true,
						template: paths.appHtml,
					},
					isEnvProduction ?
					{
						minify: {
							removeComments: true,
							collapseWhitespace: true,
							removeRedundantAttributes: true,
							useShortDoctype: true,
							removeEmptyAttributes: true,
							removeStyleLinkTypeAttributes: true,
							keepClosingSlash: true,
							minifyJS: true,
							minifyCSS: true,
							minifyURLs: true,
						},
					} :
					undefined
				)
			),
			// Inlines the webpack runtime script. This script is too small to warrant
			// a network request.
			// https://github.com/facebook/create-react-app/issues/5358
			isEnvProduction &&
			shouldInlineRuntimeChunk &&
			new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime-.+[.]js/]),
			// Makes some environment variables available in index.html.
			// The public URL is available as %PUBLIC_URL% in index.html, e.g.:
			// <link rel="icon" href="%PUBLIC_URL%/favicon.ico">
			// It will be an empty string unless you specify "homepage"
			// in `package.json`, in which case it will be the pathname of that URL.
			new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
			// This gives some necessary context to module not found errors, such as
			// the requesting resource.
			new ModuleNotFoundPlugin(paths.appPath),
			// Makes some environment variables available to the JS code, for example:
			// if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
			// It is absolutely essential that NODE_ENV is set to production
			// during a production build.
			// Otherwise React will be compiled in the very slow development mode.
			new webpack.DefinePlugin(env.stringified),
			// This is necessary to emit hot updates (CSS and Fast Refresh):
			isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
			// Experimental hot reloading for React .
			// https://github.com/facebook/react/tree/master/packages/react-refresh
			isEnvDevelopment &&
			shouldUseReactRefresh &&
			new ReactRefreshWebpackPlugin({
				overlay: {
					entry: webpackDevClientEntry,
					// The expected exports are slightly different from what the overlay exports,
					// so an interop is included here to enable feedback on module-level errors.
					module: reactRefreshOverlayEntry,
					// Since we ship a custom dev client and overlay integration,
					// the bundled socket handling logic can be eliminated.
					sockIntegration: false,
				},
			}),
			// Watcher doesn't work well if you mistype casing in a path so we use
			// a plugin that prints an error when you attempt to do this.
			// See https://github.com/facebook/create-react-app/issues/240
			isEnvDevelopment && new CaseSensitivePathsPlugin(),
			// If you require a missing module and then `npm install` it, you still have
			// to restart the development server for webpack to discover it. This plugin
			// makes the discovery automatic so you don't have to restart.
			// See https://github.com/facebook/create-react-app/issues/186
			isEnvDevelopment &&
			new WatchMissingNodeModulesPlugin(paths.appNodeModules),
			isEnvProduction &&
			new MiniCssExtractPlugin({
				// Options similar to the same options in webpackOptions.output
				// both options are optional
				filename: 'static/css/[name].[contenthash:8].css',
				chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
			}),
			// Generate an asset manifest file with the following content:
			// - "files" key: Mapping of all asset filenames to their corresponding
			//   output file so that tools can pick it up without having to parse
			//   `index.html`
			// - "entrypoints" key: Array of files which are included in `index.html`,
			//   can be used to reconstruct the HTML if necessary
			new ManifestPlugin({
				fileName: 'asset-manifest.json',
				publicPath: paths.publicUrlOrPath,
				generate: (seed, files, entrypoints) => {
					const manifestFiles = files.reduce((manifest, file) => {
						manifest[file.name] = file.path;
						return manifest;
					}, seed);
					const entrypointFiles = entrypoints.main.filter(
						fileName => !fileName.endsWith('.map')
					);

					return {
						files: manifestFiles,
						entrypoints: entrypointFiles,
					};
				},
			}),
			// Moment.js is an extremely popular library that bundles large locale files
			// by default due to how webpack interprets its code. This is a practical
			// solution that requires the user to opt into importing specific locales.
			// https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
			// You can remove this if you don't use Moment.js:
			new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
			// Generate a service worker script that will precache, and keep up to date,
			// the HTML & assets that are part of the webpack build.
			isEnvProduction &&
			fs.existsSync(swSrc) &&
			new WorkboxWebpackPlugin.InjectManifest({
				swSrc,
				dontCacheBustURLsMatching: /\.[0-9a-f]{8}\./,
				exclude: [/\.map$/, /asset-manifest\.json$/, /LICENSE/],
			}),
			// TypeScript type checking
			useTypeScript &&
			new ForkTsCheckerWebpackPlugin({
				typescript: resolve.sync('typescript', {
					basedir: paths.appNodeModules,
				}),
				async: isEnvDevelopment,
				checkSyntacticErrors: true,
				resolveModuleNameModule: process.versions.pnp ?
					`${__dirname}/pnpTs.js` :
					undefined,
				resolveTypeReferenceDirectiveModule: process.versions.pnp ?
					`${__dirname}/pnpTs.js` :
					undefined,
				tsconfig: paths.appTsConfig,
				reportFiles: [
					// This one is specifically to match during CI tests,
					// as micromatch doesn't match
					// '../cra-template-typescript/template/src/App.tsx'
					// otherwise.
					'../**/src/**/*.{ts,tsx}',
					'**/src/**/*.{ts,tsx}',
					'!**/src/**/__tests__/**',
					'!**/src/**/?(*.)(spec|test).*',
					'!**/src/setupProxy.*',
					'!**/src/setupTests.*',
				],
				silent: true,
				// The formatter is invoked directly in WebpackDevServerUtils during development
				formatter: isEnvProduction ? typescriptFormatter : undefined,
			}),
			new ESLintPlugin({
				// Plugin options
				extensions: ['js', 'mjs', 'jsx', 'ts', 'tsx'],
				formatter: require.resolve('react-dev-utils/eslintFormatter'),
				eslintPath: require.resolve('eslint'),
				context: paths.appSrc,
				// ESLint class options
				cwd: paths.appPath,
				resolvePluginsRelativeTo: __dirname,
				baseConfig: {
					extends: [require.resolve('eslint-config-react-app/base')],
					rules: {
						...(!hasJsxRuntime && {
							'react/react-in-jsx-scope': 'error',
						}),
					},
				},
			}),
		].filter(Boolean),
		// Some libraries import Node modules but don't use them in the browser.
		// Tell webpack to provide empty mocks for them so importing them works.
		node: {
			module: 'empty',
			dgram: 'empty',
			dns: 'mock',
			fs: 'empty',
			http2: 'empty',
			net: 'empty',
			tls: 'empty',
			child_process: 'empty',
		},
		// Turn off performance processing because we utilize
		// our own hints via the FileSizeReporter
		performance: false,
	};
};
